collation in sql 2005

Does anyone know if there is a command in query analizer for sql server 2005 (Express) that changes the collation of all the char (varchar, nvarchar etc) in a table or in a database. And I don't mean to set the collation when creating a database, but to modify a database's collation seting.

thank you

This information might help:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/architec/8_ar_da_3zw3.asp

Buck Woody